Fresenius Medical Care 2008K Troubleshooting Manual page 57

F- 15.0.3 CHECK RESTRICTOR #48 O-RINGS (Old style Hydro Block only)
a) Turn the water off and clamp the vent tubing (see
b) Referring to Figure 27
missing o-rings affect loading pressure and should be replaced during Annual Preventative Maintenance.
c) Reinstall the restrictor and tighten until snug. Never use an electric screwdriver! If the restrictor does not
tighten snug the threads may be stripped and this requires replacing the hydro block.
IMPORTANT!
d) Turn the water on and unclamp the vent tubing.
e) See procedure number
F- 15.0.4 RECHECK LOADING PRESSURE
IMPORTANT!
a) Turn Dialysate ON (Dialysate Flow on/off LED off).
b) Loading pressure may be cycling to below its minimum but is it peaking to a maximum of between: 23
and 27 psi (equipped with DiaSafe
Yes See procedure number
No See procedure number
F- 15.0.5 ISOLATE DEAERATION PUMP (#20)
a) Referring to Figure 27
procedure will use pliers to clamp the white
tubing BETWEEN loading pressure valve #65
and the hydro block/hydro chamber.
WARNING! Do NOT use a plastic clamp!
b) Proceed according to how the machine is
equipped (Old Style Hydro Block OR New
Style Hydro Chamber):
Old Style Hydro Block: The white
tubing extends from the bottom of valve
#65 (see Figure right)
New Style Hydro Chamber: The white tubing extends from the top of valve #65 (see Figure above)
c) While watching loading pressure, TIGHTLY clamp then QUICKLY UNCLAMP the white tubing.
d) When clamped, does pressure increase to 30 psi or greater?
Yes Replace loading pressure valve #65 (see
AND LOADING PRESSURE per procedure.
No See procedure number
F- 15.0.6 ISOLATE DEAERATION PUMP / MOTOR
Referring to Figure 27 (page 54) to locate the deaeration pump:
a) Turn the machine off.
b) Referring to Figure (right), remove the pump head from the motor.
c) Manually spin the 'Drive Magnet' 360°. Does it rotate freely?
Yes a) Assure the 'Drive Magnet' rotates the motor shaft. It may
have come uncoupled.
b) Two possibilities: 1) Bad pump; 2) Bad motor (or brushes).
No The motor is bad (brushes WON'T help).
(page 54), check or replace both of restrictor #48's o-rings (P/N 579070). Bad or
F- 15.0.4 (page 55).
®
filter); 18 and 22 psi (NOT equipped with DiaSafe
F- 18.0.0 (page 58).
F- 15.0.5 (page 55).
(page 54), this
F- 15.0.6 (page 55).
Fresenius 2008K Troubleshooting Guide
P/N 507298 Rev. B (Draft 1)
Section 1 – Flow Errors In Dialysis Program
Figure 6, page 13).
Figure 27, page 54) and calibrate DEAERATION
®
filter)?
Page 55